Links to various docs on using K8S as an identity provider for JWT tokens - TokenReview and TokenRequest APIs.
https://jpweber.io/blog/a-look-at-tokenrequest-api/
https://github.com/mikedanese/community/blob/2bf41bd80a9a50b544731c74c7d956c041ec71eb/contributors/design-proposals/storage/svcacct-token-volume-source.md
https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.18/#tokenreview-v1-authentication-k8s-io
https://github.com/kubernetes/community/blob/master/contributors/design-proposals/auth/bound-service-account-tokens.md
